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5ed24862c0
Image formats used to be FourCCs, so unsigned int was better. But now it's annoying and the only difference is that unsigned int is more to type than int.
169 lines
6.6 KiB
C
169 lines
6.6 KiB
C
/*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPLAYER_MP_IMAGE_H
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#define MPLAYER_MP_IMAGE_H
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include "common/common.h"
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#include "common/msg.h"
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#include "csputils.h"
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#include "video/img_format.h"
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#define MP_PALETTE_SIZE (256 * 4)
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#define MP_IMGFIELD_ORDERED 0x01
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#define MP_IMGFIELD_TOP_FIRST 0x02
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#define MP_IMGFIELD_REPEAT_FIRST 0x04
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#define MP_IMGFIELD_TOP 0x08
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#define MP_IMGFIELD_BOTTOM 0x10
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#define MP_IMGFIELD_INTERLACED 0x20
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// Describes image parameters that usually stay constant.
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// New fields can be added in the future. Code changing the parameters should
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// usually copy the whole struct, so that fields added later will be preserved.
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struct mp_image_params {
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enum mp_imgfmt imgfmt; // pixel format
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int w, h; // image dimensions
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int d_w, d_h; // define display aspect ratio (never 0/0)
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enum mp_csp colorspace;
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enum mp_csp_levels colorlevels;
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enum mp_chroma_location chroma_location;
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// The image should be converted to these levels. Unlike colorlevels, it
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// does not describe the current state of the image. (Somewhat similar to
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// d_w/d_h vs. w/h.)
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enum mp_csp_levels outputlevels;
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};
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/* Memory management:
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* - mp_image is a light-weight reference to the actual image data (pixels).
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* The actual image data is reference counted and can outlive mp_image
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* allocations. mp_image references can be created with mp_image_new_ref()
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* and free'd with talloc_free() (the helpers mp_image_setrefp() and
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* mp_image_unrefp() can also be used). The actual image data is free'd when
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* the last mp_image reference to it is free'd.
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* - Each mp_image has a clear owner. The owner can do anything with it, such
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* as changing mp_image fields. Instead of making ownership ambiguous by
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* sharing a mp_image reference, new references should be created.
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* - Write access to the actual image data is allowed only after calling
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* mp_image_make_writeable(), or if mp_image_is_writeable() returns true.
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* Conceptually, images can be changed by their owner only, and copy-on-write
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* is used to ensure that other references do not see any changes to the
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* image data. mp_image_make_writeable() will do that copy if required.
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*/
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typedef struct mp_image {
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unsigned int flags; // same as fmt.flags
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struct mp_imgfmt_desc fmt;
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// fields redundant to fmt, for convenience or compatibility
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enum mp_imgfmt imgfmt;
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int num_planes;
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int chroma_x_shift; // horizontal
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int chroma_y_shift; // vertical
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int w,h; // visible dimensions
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int display_w,display_h; // if set (!= 0), anamorphic size
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uint8_t *planes[MP_MAX_PLANES];
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int stride[MP_MAX_PLANES];
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char * qscale;
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int qstride;
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int pict_type; // 0->unknown, 1->I, 2->P, 3->B
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int fields;
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int qscale_type; // 0->mpeg1/4/h263, 1->mpeg2
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/* redundant */
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int chroma_width;
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int chroma_height;
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int plane_w[MP_MAX_PLANES];
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int plane_h[MP_MAX_PLANES];
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enum mp_csp colorspace;
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enum mp_csp_levels levels;
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enum mp_chroma_location chroma_location;
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/* only inside filter chain */
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double pts;
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/* memory management */
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struct m_refcount *refcount;
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/* for private use */
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void* priv;
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} mp_image_t;
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struct mp_image *mp_image_alloc(int fmt, int w, int h);
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void mp_image_copy(struct mp_image *dmpi, struct mp_image *mpi);
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void mp_image_copy_attributes(struct mp_image *dmpi, struct mp_image *mpi);
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struct mp_image *mp_image_new_copy(struct mp_image *img);
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struct mp_image *mp_image_new_ref(struct mp_image *img);
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bool mp_image_is_writeable(struct mp_image *img);
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void mp_image_make_writeable(struct mp_image *img);
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void mp_image_setrefp(struct mp_image **p_img, struct mp_image *new_value);
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void mp_image_unrefp(struct mp_image **p_img);
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void mp_image_clear(struct mp_image *mpi, int x0, int y0, int x1, int y1);
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void mp_image_crop(struct mp_image *img, int x0, int y0, int x1, int y1);
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void mp_image_crop_rc(struct mp_image *img, struct mp_rect rc);
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void mp_image_vflip(struct mp_image *img);
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void mp_image_set_size(struct mp_image *mpi, int w, int h);
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void mp_image_set_display_size(struct mp_image *mpi, int dw, int dh);
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void mp_image_setfmt(mp_image_t* mpi, int out_fmt);
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void mp_image_steal_data(struct mp_image *dst, struct mp_image *src);
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struct mp_image *mp_image_new_custom_ref(struct mp_image *img, void *arg,
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void (*free)(void *arg));
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struct mp_image *mp_image_new_external_ref(struct mp_image *img, void *arg,
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void (*ref)(void *arg),
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void (*unref)(void *arg),
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bool (*is_unique)(void *arg),
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void (*free)(void *arg));
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struct mp_csp_details;
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void mp_image_set_colorspace_details(struct mp_image *image,
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struct mp_csp_details *csp);
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void mp_image_params_guess_csp(struct mp_image_params *params);
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bool mp_image_params_equals(const struct mp_image_params *p1,
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const struct mp_image_params *p2);
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void mp_image_params_from_image(struct mp_image_params *params,
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const struct mp_image *image);
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void mp_image_set_params(struct mp_image *image,
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const struct mp_image_params *params);
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void mp_image_set_attributes(struct mp_image *image,
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const struct mp_image_params *params);
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struct AVFrame;
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void mp_image_copy_fields_from_av_frame(struct mp_image *dst,
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struct AVFrame *src);
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void mp_image_copy_fields_to_av_frame(struct AVFrame *dst,
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struct mp_image *src);
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struct mp_image *mp_image_from_av_frame(struct AVFrame *av_frame);
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struct AVFrame *mp_image_to_av_frame_and_unref(struct mp_image *img);
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#endif /* MPLAYER_MP_IMAGE_H */
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